Makita Demolition Hammer Instruction Manual

Explanation of General View

This section describes the various parts of the demolition hammer:

• 1. Switch lever (ON/OFF)
• 2. Adjusting dial (for blows per minute)
• 3. Power-ON indicator lamp (green)
• 4. Service indicator lamp (red)
• 5. Side grip (auxiliary handle)
• 6. D-sided side handle
• 7. Clamp nut
• 8. Bit shank
• 9. Bit grease
• 10. Releasing cover
• 11. Change ring
• 12. Screws
• 13. Connector
• 14. White part
• 15. Black part
• 16. Crank cap cover
• 17. Screwdriver
• 18. Grease

Visual descriptions of the tool's components and their interactions are provided through a series of diagrams. For example, Figure 1 shows the switch lever and its ON/OFF positions. Figure 2 illustrates the adjusting dial. Figures 3 and 4 depict the side grips. Figures 5, 6, 7, 8, 9, 10, and 11 demonstrate the process of installing, removing, and adjusting the bit, including applying bit grease and securing the bit. Figures 12 and 13 show the tool in operation for chipping/demolition. Figures 14, 15, 16, 17, and 18 illustrate steps for maintenance, such as disassembling parts for lubrication and reassembly.

Specifications

Specifications are subject to change due to ongoing research and development. They may vary by country. Weight is determined according to EPTA-Procedure 01/2003.

Intended Use

The tool is designed for chiseling work in concrete, brick, stone, and asphalt, as well as for driving and compacting with appropriate accessories.

Power Supply

The tool should be connected only to a power supply of the same voltage as indicated on the nameplate, and can only be operated on single-phase AC supply. It is double-insulated in accordance with European Standard and can, therefore, also be used from sockets without earth wire.

General Power Tool Safety Warnings

WARNING: Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.

Hammer Safety Warnings

1. Wear ear protectors to prevent hearing loss from noise exposure.
2. Use auxiliary handle(s), if supplied, to maintain control and prevent personal injury.
3. Hold the power tool by insulated gripping surfaces when performing operations where the cutting accessory may contact hidden wiring or its own cord. Contact with a 'live' wire can electrify exposed metal parts of the tool, causing electric shock.
4. Wear a hard hat (safety helmet), safety glasses, and/or face shield. Ordinary eye or sun glasses are not safety glasses. A dust mask and thickly padded gloves are also highly recommended.
5. Ensure the bit is secured in place before operation.
6. Under normal operation, the tool produces vibration. Regularly check the tightness of screws to prevent loosening, which can cause breakdown or accident.
7. In cold weather or after long periods of non-use, operate the tool under no load for a while to warm up and loosen lubrication. Proper warm-up is essential for effective hammering.
8. Always ensure firm footing. When using the tool in high locations, ensure no one is below.
9. Hold the tool firmly with both hands.
10. Keep hands away from moving parts.
11. Do not leave the tool running unattended. Operate the tool only when hand-held.
12. Do not point the tool at anyone in the area during operation, as the bit could fly out and cause serious injury.
13. Do not touch the bit or parts close to it immediately after operation, as they may be extremely hot and cause skin burns.
14. Do not operate the tool at no-load unnecessarily.
15. Some materials contain toxic chemicals. Take caution to prevent dust inhalation and skin contact. Follow material supplier safety data sheets.

WARNING: Do not let comfort or familiarity with the product (gained from repeated use) replace strict adherence to safety rules. Misuse or failure to follow safety rules in this instruction manual may cause serious personal injury.

Functional Description

CAUTION: Always ensure the tool is switched off and unplugged before adjusting or checking any function.

Switch Action

CAUTION: Before plugging in the tool, always check that it is switched off.

The switch lever (1) can be locked in the 'ON' (I) position for extended use. Exercise caution and maintain a firm grasp when locked. To start, push the switch lever to 'ON' (I) on the left side. To stop, push the switch lever to 'OFF' (O) on the right side.

Speed Change

The blows per minute can be adjusted by turning the adjusting dial (2), even while the tool is running. The dial is marked 1 (lowest speed) to 5 (full speed). Refer to the table below for the relationship between the number settings on the adjusting dial and the blows per minute:

CAUTION: The speed adjusting dial can only be turned as far as 5 and back to 1. Do not force it past these limits, or the speed adjusting function may no longer work.

NOTE (For Model HM0871C only): Blows per minute at no load are smaller than under load to reduce vibration, which is not a malfunction. Once operation starts with a bit against concrete, blows per minute increase to the numbers shown in the table. In low temperatures or with less fluid grease, this function may not work even with the motor rotating.

Indicator Lamp

The green power-ON indicator lamp (3) lights up when the tool is plugged in. If it does not light up, the mains cord or controller may be malfunctioning. If the lamp is lit but the tool does not start when switched on, the carbon brushes may be worn out, or the controller, motor, or ON/OFF switch may be defective.

The red service indicator lamp (4) flickers when the carbon brushes are nearly worn out, indicating that the tool needs servicing. After approximately 8 hours of use, the motor will automatically shut off.

Assembly

CAUTION: Always ensure the tool is switched off and unplugged before carrying out any work on the tool.

Side Handle (Auxiliary Handle)

For tool with stick type side handle (Fig. 4)

The side grip (5) swings to either side for easy handling. Loosen the side grip by turning it counterclockwise, swing it to the desired position, and then tighten it by turning clockwise.

For tool with D-shaped side handle (Fig. 5)

The D-shaped side handle (6) can be swung 360° vertically and secured at any desired position. It also secures at eight different horizontal positions. Loosen the clamp nut (7) to swing the side handle to a desired position, then tighten the clamp nut securely.

Installing or Removing the Bit (Fig. 6, 7, 8, 9)

Clean the bit shank (8) and apply bit grease (9) before installing. Insert the bit into the tool. Turn the bit and push it in until it engages. If the bit cannot be pushed in, remove it, pull the releasing cover (10) down a couple of times, then reinsert the bit. After installing, always ensure the bit is securely held by trying to pull it out. To remove the bit, pull the releasing cover (10) down all the way and pull the bit out.

Bit Angle (Fig. 10 & 11)

The bit can be secured at 12 different angles. To change the bit angle, slide the change ring (11) forward, then turn it to the desired angle. Slide the change ring back to the original position to secure the bit.

NOTE: The change ring cannot turn when the bit is not installed on the tool.

Operation

Chipping/Scaling/Demolition (Fig. 12 & 13)

Always use the side grip (auxiliary handle) and firmly hold the tool by both side grip and switch handle during operations. Turn the tool on and apply slight pressure so it does not bounce uncontrollably. Pressing too hard will not increase efficiency.

Maintenance

CAUTION: Always ensure the tool is switched off and unplugged before attempting to perform inspection or maintenance. Never use gasoline, benzine, thinner, alcohol, or similar substances, as they may cause discoloration, deformation, or cracks.

Lubrication

CAUTION: This servicing should be performed by Makita Authorized Service Centers only.

This tool has a grease-packed lubrication system and does not require hourly or daily lubrication. It should be lubricated every time the carbon brushes are replaced. Send the complete tool to a Makita Authorized Service Center for this lubrication service (Fig. 14).

To lubricate: Run the tool for several minutes to warm it up. Switch off and unplug. Loosen the four screws and remove the handle (Fig. 15). Disconnect the connector (13) by pulling it (Fig. 16). Loosen the four screws on the crank cap and remove the crank cap cover (16) (Fig. 17). Wipe out old grease and replace with 30g of fresh Makita genuine hammer grease (optional accessory). Overfilling can cause faulty hammering action or tool failure. Fill only with the specified amount.

CAUTION: Be careful not to damage the connector (13) or lead wires (14) when wiping out old grease. To reassemble, follow the disassembling procedure in reverse.

CAUTION: Do not tighten the crank cap excessively; it is made of resin and subject to breakage. Be careful not to damage the connector (13) or lead wires (14) when installing the handle (Fig. 18). Connect the connector firmly and then reinstall the handle.

To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and replacement, and any other maintenance or adjustment should be performed by Makita Authorized Service Centers, always using Makita replacement parts.

Accessories

CAUTION: These accessories or attachments are recommended for use with your Makita tool specified in this manual. Using other accessories or attachments might present a risk of injury. Only use accessories for their stated purpose.

For assistance or more details regarding accessories, contact your local Makita Service Center.

Recommended accessories include:

• Bull point (SDS-max)
• Cold chisel (SDS-max)
• Scaling chisel (SDS-max)
• Clay spade (SDS-max)
• Bit grease
• Safety goggles
• Hammer grease
• Plastic carrying case

Noise and Vibration Information

For Model HM0871C

Typical A-weighted noise level determined according to EN60745:

• Sound pressure level (L_PA): 86 dB (A)
• Sound power level (L_WA): 97 dB (A)
• Uncertainty (K): 3 dB (A)

Wear ear protection.

Vibration total value (tri-axial vector sum) determined according to EN60745:

• Work mode: chiseling function with side handle
• Vibration emission (a_h,Cheq): 8.0 m/s²
• Uncertainty (K): 1.5 m/s²

• Work mode: chiseling function with side grip
• Vibration emission (a_h,Cheq): 8.0 m/s²
• Uncertainty (K): 2.0 m/s²

For Model HM0870C

Typical A-weighted noise level determined according to EN60745:

• Sound pressure level (L_PA): 87 dB (A)
• Sound power level (L_WA): 98 dB (A)
• Uncertainty (K): 3 dB (A)

Wear ear protection.

Vibration total value (tri-axial vector sum) determined according to EN60745:

• Work mode: chiseling function with side handle
• Vibration emission (a_h,Cheq): 11.0 m/s²
• Uncertainty (K): 1.5 m/s²

• Work mode: chiseling function with side grip
• Vibration emission (a_h,Cheq): 11.5 m/s²
• Uncertainty (K): 1.5 m/s²

The declared vibration emission value has been measured in accordance with the standard test method and may be used for comparing one tool with another. It may also be used in a preliminary assessment of exposure.

WARNING: The vibration emission during actual use of the power tool can differ from the declared emission value depending on how the tool is used. Identify safety measures to protect the operator based on an estimation of exposure in actual conditions of use (considering all parts of the operating cycle, including times when the tool is switched off and running idle).

EC Declaration of Conformity

Makita Corporation, as the responsible manufacturer, declares that the Demolition Hammers, Model No./Type: HM0871C, HM0870C, are of series production and conform to the following European Directives: 98/37/EC (until 28th December 2009) and 2006/42/EC (from 29th December 2009). They are manufactured in accordance with EN60745 standards.

The technical documentation is kept by Makita International Europe Ltd., Michigan, Drive, Tongwell, Milton Keynes, MK15 8JD, England.

Date: 24th April 2009

Signed: Tomoyasu Kato, Director, Makita Corporation, 3-11-8, Sumiyoshi-cho, Anjo, Aichi, JAPAN.